Just all the Normal Tickets, in the store. I have like 2 left to get.
Those normal tickets have given me 2 SSR's.

Not really worth going for the SSR one as the cost is really high and you most likely will get an SSR you don't want.
As for the SR one better to go for the Normal Tickets as you most likely will get 1+ SR units with those.

event story is over, basically everyone appears all over the place when returning to the future and they go reuniting everyone again, Wako participate on a presentation with the Sakura Wars characters.

everyone return home, you can claim your Wako coin now, missing 2 SR tickets be back at night good day to you all